136522610506661 has 4 divisors (see below), whose sum is σ = 136554710819052. Its totient is φ = 136490510194272.

The previous prime is 136522610506649. The next prime is 136522610506663. The reversal of 136522610506661 is 166605016225631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48512882684161 + 88009727822500 = 6965119^2 + 9381350^2 .

It is a cyclic number.

It is not a de Polignac number, because 136522610506661 - 2²² = 136522606312357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136522610506663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16050149816 + ... + 16050158321.

It is an arithmetic number, because the mean of its divisors is an integer number (34138677704763).

Almost surely, 2^{136522610506661} is an apocalyptic number.

It is an amenable number.

136522610506661 is a deficient number, since it is larger than the sum of its proper divisors (32100312391).

136522610506661 is an equidigital number, since it uses as much as digits as its factorization.

136522610506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32100312390.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 136522610506661 in words is "one hundred thirty-six trillion, five hundred twenty-two billion, six hundred ten million, five hundred six thousand, six hundred sixty-one".